2651663879 has 4 divisors (see below), whose sum is σ = 2671905720. Its totient is φ = 2631422040.

The previous prime is 2651663857. The next prime is 2651663881. The reversal of 2651663879 is 9783661562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9783661562 = 2 ⋅4891830781.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2651663879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2651663879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651663849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10120724 + ... + 10120985.

It is an arithmetic number, because the mean of its divisors is an integer number (667976430).

Almost surely, 2^2651663879 is an apocalyptic number.

2651663879 is a deficient number, since it is larger than the sum of its proper divisors (20241841).

2651663879 is a wasteful number, since it uses less digits than its factorization.

2651663879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20241840.

The product of its digits is 3265920, while the sum is 53.

The square root of 2651663879 is about 51494.3091904338. The cubic root of 2651663879 is about 1384.1170683978.

The spelling of 2651663879 in words is "two billion, six hundred fifty-one million, six hundred sixty-three thousand, eight hundred seventy-nine".